App#define can be added through configure
message tweak
add pry for debugging tests
oops Content#tempfile didn't exist
Content can be updated with another content
assigning model accessor is not lazy so assigning from a Job/Attachment  will work properly, even from another app
no need for storage_xxx methods
renamed storage_opts -> storage_options
better error message
added default for model accessors
Whitelist#push
model accessor default adds to fetch_file_whitelist